Download [CVS] Cloud Virtualization Specialist Certification Exam Preparation and more Exams Technology in PDF only on Docsity!
Certification Exam Preparation
Question 1. Which cloud characteristic ensures that resources can be automatically increased or decreased based on demand? A) Multi‑tenancy B) Elasticity C) Resiliency D) Measured usage Answer: B Explanation: Elasticity allows automatic scaling of compute, storage, or network resources to match workload fluctuations. Question 2. In virtualization history, which technology first introduced the concept of partitioning a single physical server into multiple isolated environments? A) Containerization B) Mainframe logical partitions (LPARs) C) Hyper‑Threading D) Cloud bursting Answer: B Explanation: Mainframe LPARs allowed multiple OS instances on one mainframe, laying groundwork for modern virtualization. Question 3. Which delivery model provides a complete development and deployment platform, abstracting the underlying operating system? A) IaaS B) PaaS C) SaaS D) DaaS Answer: B
Certification Exam Preparation
Explanation: Platform‑as‑a‑Service offers runtime environments, databases, and middleware, letting developers focus on code. Question 4. Which deployment model is shared among several organizations with common security, compliance, and performance requirements? A) Public cloud B) Private cloud C) Community cloud D) Hybrid cloud Answer: C Explanation: Community clouds are jointly used by organizations with similar concerns, offering shared governance. Question 5. When calculating ROI for a virtualized solution, which cost component is typically not included? A) Capital expenditure (CapEx) for hardware B) Operational expenditure (OpEx) for power and cooling C) License fees for virtualization software D) Employee salaries for unrelated business units Answer: D Explanation: ROI calculations consider costs directly tied to the solution; unrelated salaries are excluded. Question 6. Which hypervisor type runs directly on the host hardware without a underlying operating system? A) Type 1 (bare‑metal) B) Type 2 (hosted)
Certification Exam Preparation
A) Transparent Page Sharing (TPS) B) Memory ballooning C) NUMA awareness D) SR‑IOV Answer: B Explanation: Balloon drivers request the guest OS to release memory, which the hypervisor can reallocate. Question 10. Thin provisioning a virtual disk primarily reduces: A) I/O latency B) Storage capacity consumption until data is written C) Network bandwidth usage D) CPU utilization on the host Answer: B Explanation: Thin provisioning allocates space on demand, conserving storage until the VM actually writes data. Question 11. Which storage type is best suited for storing large, unstructured objects such as media files? A) Block storage B) File storage C) Object storage D) Tape storage Answer: C Explanation: Object storage (e.g., S3) handles massive unstructured data with metadata and scalability.
Certification Exam Preparation
Question 12. In a virtual switch, what does VLAN tagging (802.1Q) enable? A) Encryption of VM traffic B) Isolation of traffic across virtual networks C) Automatic IP address assignment D) Load balancing of storage I/O Answer: B Explanation: VLAN tags separate broadcast domains, allowing multiple logical networks on the same physical switch. Question 13. Which technology provides near‑bare‑metal network performance by allowing a VM direct access to a physical NIC? A) vSwitch port mirroring B) NIC Teaming C) SR‑IOV D) VXLAN Answer: C Explanation: SR‑IOV assigns virtual functions of a NIC directly to VMs, bypassing the hypervisor’s software stack. Question 14. Micro‑segmentation in a virtualized environment is primarily implemented through: A) Physical firewalls B) Virtual firewalls or distributed security policies C) VLAN trunking only D) DNS filtering
Certification Exam Preparation
C. Host health and connectivity D. Storage tier performance Answer: C Explanation: Heartbeat messages confirm that hosts are alive; loss triggers failover mechanisms. Question 18. Which KPI is most directly associated with storage performance in a virtual environment? A. CPU ready time B. Network throughput C. IOPS (Input/Output Operations Per Second) D. VM uptime Answer: C Explanation: IOPS measures the number of read/write operations a storage system can handle, indicating performance. Question 19. In capacity planning, “right‑sizing” a VM means: A. Allocating the maximum possible resources B. Matching allocated resources to actual workload demand C. Over‑committing CPU cores for cost savings D. Using the smallest possible OS image Answer: B Explanation: Right‑sizing ensures VMs have sufficient resources without waste, optimizing cost and performance. Question 20. Which attack aims to escape from a guest OS to the hypervisor layer? A. Phishing
Certification Exam Preparation
B. VM escape C. DDoS D. Man‑in‑the‑middle Answer: B Explanation: VM escape exploits vulnerabilities to break isolation and gain control of the hypervisor. Question 21. Role‑Based Access Control (RBAC) in a virtualized environment primarily restricts: A. Network bandwidth per VM B. Administrative actions based on user roles C. CPU cycles per guest OS D. Storage encryption keys Answer: B Explanation: RBAC assigns permissions to roles, ensuring users can perform only authorized management tasks. Question 22. Which of the following is a recommended practice for hardening a VM’s BIOS/UEFI? A. Enable PXE boot as default B. Disable secure boot C. Set a BIOS password and enable secure boot D. Allow boot from external media Answer: C Explanation: BIOS passwords and secure boot prevent unauthorized firmware changes and booting from untrusted media.
Certification Exam Preparation
Explanation: Cloud bursting moves excess workload to a public cloud when the private cloud reaches capacity. Question 26. In a cross‑region failover design, which component ensures that DNS resolves to the healthy region after a failure? A. DHCP server B. Global load balancer with health checks C. Local host file entries D. Static IP address assignment Answer: B Explanation: Global load balancers monitor endpoint health and update DNS records to route traffic to the operational region. Question 27. When performing a P2V conversion, the most critical step is: A. Installing the same OS version on the target VM B. Capturing a consistent image of the physical machine’s disks C. Allocating more vCPU than the physical CPU count D. Disabling all network adapters on the source host Answer: B Explanation: A consistent disk image ensures data integrity and a successful migration to the virtual environment. Question 28. Which virtualization technology provides the smallest overhead by sharing the host kernel? A. Full VM (KVM, ESXi) B. Paravirtualization (Xen) C. Containerization (Docker)
Certification Exam Preparation
D. Emulation (QEMU) Answer: C Explanation: Containers use the host OS kernel, eliminating the need for a separate guest OS, resulting in minimal overhead. Question 29. What is the primary benefit of using eager zeroing when provisioning thick virtual disks? A. Faster initial VM boot time B. Immediate allocation of storage space without zeroing C. Security by ensuring all blocks are pre‑zeroed before use D. Reduced network traffic during provisioning Answer: C Explanation: Eager zeroing wipes all blocks at creation, preventing data remnants from being exposed to other VMs. Question 30. Which metric is most useful for evaluating the resiliency of a cloud service? A. Mean Time to Recovery (MTTR) B. CPU utilization percentage C. Number of active users D. Storage capacity utilization Answer: A Explanation: MTTR measures how quickly a service can recover from failures, directly reflecting resiliency. Question 31. In a virtualized environment, which feature allows a VM to access a storage array directly, bypassing the host’s storage stack? A. NFS sharing
Certification Exam Preparation
Question 34. In a multi‑tenant public cloud, isolation between tenants is primarily achieved through: A. Separate physical servers for each tenant B. Network firewalls only C. Virtualization and logical isolation mechanisms (VLANs, hypervisor controls) D. Unique IP address ranges per tenant Answer: C Explanation: Virtualization creates isolated compute, storage, and network contexts, ensuring tenant data separation. Question 35. Which SLA metric defines the percentage of time a service is expected to be operational? A. Latency B. Throughput C. Availability D. Data durability Answer: C Explanation: Availability is expressed as a percentage (e.g., 99.9%) representing expected uptime. Question 36. What is the primary purpose of a “gold image” in a virtualized environment? A. Store application logs B. Serve as a pre‑configured, hardened VM template for rapid deployment C. Act as a backup of all VMs D. Provide a benchmark for performance testing Answer: B
Certification Exam Preparation
Explanation: A gold image contains a baseline OS, patches, and settings, ensuring consistency and security across deployments. Question 37. Which of the following is a key advantage of using a community cloud for a consortium of universities? A. Unlimited scaling without cost B. Shared governance and compliance with academic data policies C. Complete isolation from the internet D. Exclusive use of a single vendor’s hardware Answer: B Explanation: Community clouds allow participants to define common policies and share resources aligned with sector‑specific requirements. Question 38. In a virtual environment, “vMotion” primarily handles: A. Live migration of VM memory and CPU state B. Replication of VM disks to a backup site C. Automatic scaling of VM resources D. Encryption of VM traffic Answer: A Explanation: vMotion moves a running VM between hosts with minimal downtime by transferring its active state. Question 39. Which storage tier is typically used for “cold” data that is infrequently accessed? A. SSD tier B. NVMe tier C. HDD tier
Certification Exam Preparation
B. Too much allocated RAM C. Network congestion D. Disk latency Answer: A Explanation: CPU ready time measures how long a VM waits for the hypervisor to schedule its vCPU; high values indicate CPU contention. Question 43. Which of the following best defines “elastic load balancing” in cloud environments? A. Fixed distribution of traffic to a set of servers B. Automatic addition or removal of backend instances based on load C. Manual configuration of DNS records D. Load balancing only at the application layer (L7) Answer: B Explanation: Elastic load balancers scale the pool of backend resources dynamically as traffic fluctuates. Question 44. In a virtualized storage environment, “LUN masking” is used to: A. Encrypt LUN data at rest B. Restrict which hosts can see specific LUNs C. Increase IOPS of a LUN automatically D. Convert block storage to object storage Answer: B Explanation: LUN masking limits visibility of storage volumes to authorized initiators, enhancing security.
Certification Exam Preparation
Question 45. Which feature of a hypervisor helps prevent “VM sprawl” by limiting the number of VMs a user can create? A. vMotion quotas B. RBAC with VM creation permissions C. DRS affinity rules D. Distributed firewall policies Answer: B Explanation: Role‑Based Access Control can restrict VM provisioning rights, curbing uncontrolled VM proliferation. Question 46. Which of the following is a typical characteristic of a “private cloud” compared with a public cloud? A. Unlimited scalability on demand B. Shared infrastructure among many unrelated organizations C. Dedicated hardware and control within a single organization D. No need for internal IT staff Answer: C Explanation: Private clouds are built on dedicated resources, giving an organization full control over the environment. Question 47. In a disaster recovery (DR) scenario, the “RPO” (Recovery Point Objective) defines: A. Maximum acceptable downtime B. Maximum data loss measured in time C. Number of users that can be restored simultaneously D. Required bandwidth for replication Answer: B
Certification Exam Preparation
D. SMB
Answer: C Explanation: VMFS is a clustered file system designed for storing VM files on shared block storage. Question 51. When implementing a hybrid cloud, which component typically handles secure connectivity between on‑premises and public cloud resources? A. Public DNS B. VPN or Direct Connect/ExpressRoute C. Local firewall only D. Public load balancer Answer: B Explanation: VPN tunnels or dedicated private links provide encrypted, low‑latency connections between environments. Question 52. Which of the following is an advantage of using “object storage” over “block storage” for backup archives? A. Lower latency for random reads B. Built‑in versioning and metadata handling C. Ability to mount as a file system D. Direct block‑level access from VMs Answer: B Explanation: Object storage platforms often include versioning, lifecycle policies, and rich metadata, ideal for archival data. Question 53. In a virtualized environment, “affinity rules” are used to: A. Ensure two VMs run on the same host for performance reasons
Certification Exam Preparation
B. Encrypt traffic between VMs C. Automatically backup VMs D. Assign static IP addresses Answer: A Explanation: Affinity rules dictate placement relationships, such as co‑locating VMs that communicate frequently. Question 54. Which of the following is a primary security concern unique to multi‑tenant cloud environments? A. Physical theft of servers B. Hypervisor escape attacks C. Unpatched desktop operating systems D. Wi‑Fi eavesdropping Answer: B Explanation: Multi‑tenant isolation relies on the hypervisor; a breach can affect multiple tenants, making VM escape a critical risk. Question 55. Which metric best indicates the efficiency of a virtualized CPU scheduler? A. CPU ready time B. Disk latency C. Network jitter D. Memory swap rate Answer: A Explanation: CPU ready time reflects how quickly the scheduler allocates CPU cycles to waiting vCPUs.
